Common Stock Equivalents Excluded From Diluted Net Loss Per Share (Details) - shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Common stock equivalents diluted net income (loss) per share inclusion anti-dilutive	7,799	7,963
RSUs
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Common stock equivalents diluted net income (loss) per share inclusion anti-dilutive	1,148	1,368
Stock Options
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Common stock equivalents diluted net income (loss) per share inclusion anti-dilutive	562	622
Warrants
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Common stock equivalents diluted net income (loss) per share inclusion anti-dilutive	620	765
Shares of Common Stock Issuable upon Conversion of Series B Preferred Stock
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Common stock equivalents diluted net income (loss) per share inclusion anti-dilutive	5,469	5,208